Home / 81,736.09-122,623.89-28,420.37

Finding the Fourth Proportional to 81,736.09, 122,623.89 and 28,420.37

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Solution

The fourth proportional to 81,736.09, 122,623.89 and 28,420.37 is: 42,637.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,736.09 : 122,623.89 = 28,420.37 : x
  2. Step 2: Convert to fraction form
    81,736.09/122,623.89 = 28,420.37/x
  3. Step 3: Cross multiply
    81,736.09x = 122,623.89 × 28,420.37
  4. Step 4: Simplify right side
    81,736.09x = 3,485,016,324.64
  5. Step 5: Solve for x
    x = 3,485,016,324.64/81,736.09
  6. Step 6: Final answer
    x = 42,637.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.